This report analyzes the market potential for process valves for synfuel plants from 1980 to 2000. Several segmentations are used to estimate the market for synfuel valves. Three time periods have been specified: 1980 to 1985, 1985 to 1990, and 1990 to 2000. Four categories of synfuel technologies have been identified: gasification, indirect liquefaction, direct liquefaction, and shale oil. For each of these categories, the market for process valves is broken down according to valve type and valve rating. The major distinction in valve types is between block valves and control valves. These two major valve types are divided into three material categories: carbon steel, alloy steel, and miscellaneous (i.e., brass, bronze, copper). A fourth category, specialty valves, has also been considered. Specialty valves are those which are not proven in their proposed process application. Synfuel valves have also been classified according to their pressure rating: 150 psig valves, 300 psig valves, and greater than or equal to 600 psig valves. For specialty valves only, the design temperature has also been stipulated: 1000/sup 0/F. This report analyzes only the valve market potential for the initial construction of synthetic fuel plants. The replacement valve market which is not considered here, can be of a significant size, especially for the specialty valves which encounter most severe operating conditions. The replacement valve market will consist of supplying repair parts and replacement trims, valve rebuilding services, and to lesser extent, replacing entire valves.